ol,ul {list-style: none;}
a:link,a:visited,a:hover,a:active{text-decoration:none;}
.mt10{margin-top:10px;}
.mt20{margin-top:20px;}
.mt30{margin-top:30px;}
.mt40{margin-top:40px;}
.mt50{margin-top:50px;}
.red{color:#f00;}

#box{
    width: 400px;
    height: 400px;
    padding: 50px;
    display: none;  
    font-family: '仿宋';
    font-size: 20px;
    font-weight: 700;
}
#box2{
    width: 400px;
    height: 400px;
    padding: 50px;
    display: block;
    font-family: '仿宋';
    font-size: 20px;
    font-weight: 700;
}
